Immune System
The role of the M cell is to

pass bacteria or virus to underlying macrophages for processing and presentation of antigen
trap virus in mucus and prevent entry
induce apoptosis in virus-infected small intestinal epithelia cells
they use their cilia to propel mucus out of the small intestine

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Immune System
Which of the following statements is false regarding B cells?

B cells that recognize high concentrations of antigens (self) in the absence of other signals undergo apoptosis in the bone marrow
B cells can undergo class switching and produce a different antibody type
B cells synthesize antibodies and put them on their cell surface
B one marrow stem cells migrate to the thymus and develop into B cells

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